Fear may be felt in the heart as well as in the head, according to a study that has found a link between the cycles of a beating heart and the chance of someone feeling fear.

    Tests on healthy volunteers found that they were more likely to feel a sense of fear at the moment when their hearts are contracting（收缩）and pumping blood around their bodies, compared with the point when the heartbeat is relaxed. Scientists say the results suggest that the heart is able to influence how the brain responds to a fearful event, depending on which point it is at in its regular cycle of contraction and relaxation.

    Sarah Garfinkel at the Brighton and Sussex Medical School said: “Our study shows for the first time that the way in which we deal with fear is different depending on when we see fearful pictures in relation to our heart.”

    The study tested 20 healthy volunteers on their reactions to fear as they were shown pictures of fearful faces. Dr Garfinkel said, “The study showed that fearful faces are better noticed when the heart is pumping than when it is relaxed. Thus our hearts can also affect what we see and what we don't see and guide whether we see fear.”

    To further understand this relationship, the scientists also used a brain scanner（扫描仪）to show how the brain influences the way the heart changes a person's feeling of fear.

    “We have found an important mechanism by which the heart and brain ‘speak' to each other to change our feelings and reduce fear,” Dr Garfinkel said.

    “We hope that by increasing our understanding about how fear is dealt with and ways that it could be reduced, we may be able to develop more successful treatments for anxiety disorders, and also for those who may be suffering from serious stress disorder.”

    The Healthy Habits Survey shows that only about one third of American seniors have correct habits . Here are some findings and expert advice.

    Bike Share Toronto is the city's official bike share program, designed to give locals and visitors a fun, affordable and convenient alternative to walking, taxis, buses and the subway. There are 200 Bike Share Toronto stations and 2,000 bikes across the city, making Bike Share the most accessible way to get around and explore.

How it works

    Become an Annual Member or buy a day Pass to access the system.

    Find an available bike nearby, and get a ride code or use your member key to unlock it.

    Take as many short rides as you want while your pass or membership is active.

    Return your bike lo any station, and wait for the green light on the dock（停靠点）to make sure it's locked.

    Choose a plan

    For visitors

    Day Pass: $7.Unlimited 30-minute rides in a 24-hour period.

    3-Day Pass: $15.Unlimited 30-minute rides in a 72-hour period.

    For locals

    Monthly Pass: $25.Unlimited 30-minute rides for a month.

    Annual Membership: $90.Unlimited 30-minute rides for a whole year. The Annual Membership is the best deal for locals of Toronto and other frequent riders.

    The first 30 minutes of each ride is included with the membership or pass price. Avoid extra fees by dropping off your bike every 30 minutes at any other station. If you keep a bike out for longer than 30 minutes at a time, you will be charged an extra $1.50 for the first 30 minutes over, $4 for the next 30 minutes, and $7 for each additional 30 minutes after that.

    Contact us

    Customer Service: (855)898-2388

    Repair Service: (855)-2378

    Corporation Partners: (855)898-2398

    Employment Opportunities: (855)898-2498

    On the first day of my new high school, I almost had a nervous breakdown. Everything about the school seemed so difficult. When I got home, my parents said, "You're nervous and that's okay. Everyone is afraid of high school." I denied it. I wanted to be strong, so I refused to let anyone know about my fear, even my closest friends.

    On the first day I was late for every class and was constantly lost. The school seemed like a puzzle that I couldn't figure out. Was this how the whole year was going to be? I didn't think I could rise to this challenge, especially carrying a huge backpack that I could hardly lift. It was so big that I could knock someone out with it!

    Despite my fears, after the first week I finally had my schedule figured out. With the exception of falling up and down the stairs a couple of times and getting laughed at, high school was turning out to be not so bad. It was actually much better than middle school and much more challenging. Since then, I've been elected（选举）vice monitor of my class, which wasn't much of a victory since only three people ran for the four positions.

    It is normal to be scared about a new school. Take a deep breath and relax. High school is something that any student can overcome. Make sure you participate in some out-of-class activities because you'll find it easier to make friends. Try to do your best  even if it isn't straight A's.

    Most important of all, be who you are, whether you're a "fool"， an athlete, or a lower grader. Don't try to pretend to be someone you're not. Now you know the true secrets of high school.

In the story of "The crow and the Pitcher" from Aesop's Fables, a thisty crow (乌鸦)drops stones into a narrow jar to raise the low level of water inside so he can take a drink.

Now scientists have evidence to back up that story. Crows actually do understand how to make water displacement (移位) work to their advantage, experiments show. The results suggest that the birds are, at least in some aspects, as smart as first-graders.

Researchers, led by Sarah Jelbert at the University of Auckland in New Zealand, presented six crows with tubes filled with water. Inside the tubes, a worm or piece of meat on a piece of wood was floating, just out of reach of the crow. In front of the tubes, the researchers arranged several rubber erasers that would sink, and some plastic objects that would float. The crows found out that they could drop the erasers into the tubes in order to raise the water level and get their snack.

However, the birds handled awkwardly in experiments in which they could choose to drop objects in either a wide tube or a narrow one to get a snack, the researchers said. Dropping objects into narrow tube would lift the water level by a greater amount and put the treat within reach after just two drops; while it took around seven drops to raise the snack to the same level in the wide tube. The crows obviously didn't realize this, and most of them went for the wide tube first.

Previous studies showed that chimps and human children can solve similar tasks. In a 2011 study, chimps and kids found out that they could put water into a tube to reach a peanut that was floating in a small amount of water at the bottom.

Researchers say they've used cutting-edge gravitational wave research to cast new light on a mystery—a 2000-year-old computer,the Antikythera mechanism found in shipwreck. 

Well over a century after its discovery,researchers at the University of Glasgow say they've used statistical modeling techniques,originally designed to analyze gravitational waves —ripples in spacetime caused by major events in the universe such as two black holes combining —to suggest that the Antikythera mechanism was likely used to track the Greek lunar year. In short,it's a fascinating collision between modern-day science and the mysteries of an ancient artifact. 

In a 2021 paper,researchers found that previously discovered and regularly spaced holes in a "calendar ring"were marked to describe the "motions of the sun,moon,and all five planets known in ancient Greeks and how they were displayed at the front as an ancient Greek universe. "Now,in a new study published in the Official Journal of the British Horological Institute,University of Glasgow gravitational wave researcher Graham Woan and research associate Joseph Bayley suggest that the ring was likely perforated (打孔)with 354 holes, which happens to be the number of days in a lunar year. 

The team used statistical models derived from gravitational wave research,a large-scale physics experiment designed to measure ripples in spacetime millions of light-years from Earth and Bayesian analysis,a technique using probability to quantify uncertainty based on incomplete data,to calculate the likely number of holes in the mechanism using the positions of the surviving holes and the placement of the ring's surviving six fragments. 

Surprisingly,the inspiration for the study came from a YouTuber Chris Budiselic,who has been attempting to physically recreate the ancient mechanism and investigating ways to determine just how many holes it contained. 

"It's a neat symmetry that we've adapted techniques we use to study the universe today to understand more about a mechanism that helped people keep track of the heavens nearly two millennia ago,"Woan said. 

"We hope that our findings about the Antikythera mechanism,although less supernaturally spectacular than those made by Indiana Jones,will help deepen our understanding of how this remarkable device was made and used by the Greeks,"Woan sadded.